P2315 code meaning
Ignition Coil F Primary Control Circuit Low
Powertrain system Generic code P23xx codes Check engine light
What P2315 means
P2315 indicates that the switching line of coil F – cylinder 6 – is grounded, so six-, eight- and larger engines only. Several makers name the cylinder outright: VW's 2014 Touareg table for the six-cylinder gasoline engine CGRA speaks of the ignition coil of cylinder 6, Saab's 9-5 2.8 V6 of coil 6, and GM's 2008 3.6 V6 (LLT) lists P2315 with the other five ground-short codes. On the Saab V6, coil 6 shares the bank 2 supply with coils 2 and 4, while coils 1, 3 and 5 hang on bank 1, so a supply fault on one bank shows as a set of odd or even codes. Ford's general summary covers the series up to P2327. Ford's 2024 bulletins on wrongly mapped coil codes list the E and G codes but not P2315.
P2315 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P2315
- Check engine light on
- Misfire on cylinder 6
- Engine shakes, power down
Common causes of P2315
- Most likelyCoil F (cylinder 6) faulty
- PossibleFault in the bank 2 coil supply affecting coils 2, 4 and 6 (Saab LAU)
- PossibleCoil F control wire chafed to ground near the rear of the engine
- Less likelyEngine module output defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ignition coilCoil driverIgnition wiring
What each part of P2315 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 15 | The exact fault in that area. |
What to do next
- Note P2315 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2315
What does P2315 mean?
P2315 means "Ignition Coil F Primary Control Circuit Low". P2315 indicates that the switching line of coil F – cylinder 6 – is grounded, so six-, eight- and larger engines only. It is a generic code, so it means the same on every make.
Is it safe to drive with P2315?
Drive gently and only to a workshop. With P2315 the car can go into limp mode (reduced power) to protect itself.
Will P2315 fail an emissions test?
Yes, it can. P2315 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2315 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2315 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.